Use Of The Modified Cup Method To Determine Temperature Dependency Of Water Vapor Transmission Properties Of Building Materials PDF Download
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Author | : P. Mukhopadhyaya |
Publisher | : |
Total Pages | : 7 |
Release | : 2005 |
Genre | : Building materials |
ISBN | : |
Download Use of the Modified Cup Method to Determine Temperature Dependency of Water Vapor Transmission Properties of Building Materials Book in PDF, ePub and Kindle
This paper describes a modified cup method and its application to investigate the effects of temperature on the water vapor transmission (WVT) properties of building materials. The modified cup method is a simple and versatile technique that allows the user to vary the temperature condition of the test without altering the relative humidity. Two commonly used building materials considered in this study were fiberboard and gypsum board. The five temperature levels under consideration were between 7°C and 43°C. The WVT properties were measured at 50 % average relative humidity. The results obtained from these tests are critically analyzed and reported in this paper. These results demonstrate that there is a steady exponential increase of WVT rate, through both the materials tested, with temperature. However, water vapor permeability (WVP) through the materials shows no significant change due to the variation of temperature between 7 and 43°C. The general observations made in this study confirm that the modified cup method could be used reliably to measure WVT properties of building materials. Detailed analysis of the test results also reaffirms the fact that, for fiberboard and gypsum board, at 50 % average relative humidity condition, the WVP is not dependent on the temperature condition.
Author | : Heinz R. Trechsel |
Publisher | : ASTM International |
Total Pages | : 172 |
Release | : 1989 |
Genre | : Building materials |
ISBN | : 0803112548 |
Download Water Vapor Transmission Through Building Materials and Systems Book in PDF, ePub and Kindle
Author | : Phalguni Mukhopadhyaya |
Publisher | : ASTM International |
Total Pages | : 122 |
Release | : 2007 |
Genre | : Building materials |
ISBN | : 0803134223 |
Download Heat-air-moisture Transport Book in PDF, ePub and Kindle
Author | : Zujian Huang |
Publisher | : Springer |
Total Pages | : 304 |
Release | : 2019-05-14 |
Genre | : Architecture |
ISBN | : 3030120325 |
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This book offers a comprehensive overview of the use of bamboo in building industry. It systematically demonstrates bamboo’s utility in terms of its properties, describing the material properties of typical industrial bamboo products, and discussing their performance evaluation and optimization as building components and in the creation of building envelopes. The book also includes examples of the high-value utilization of bamboo forest resources. Further, it examines how building performance may be affected by conditions such as climate. Including insights from material science, construction design, building physics and building climatology, the book also provides data obtained from technology and market status investigation, laboratory test and the computer simulation.This book appeals to scientists and professionals, as it introduces and tests various bamboo products, demonstrating the advantages and disadvantages for each one. The book is also a valuable resource for civil engineers and students interested in this unique plant material and its application in the building industry.
Author | : MK. Kumaran |
Publisher | : |
Total Pages | : 7 |
Release | : 1998 |
Genre | : Climatology |
ISBN | : |
Download An Alternative Procedure for the Analysis of Data from the Cup Method Measurements for Determination of Water Vapor Transmission Properties Book in PDF, ePub and Kindle
The cup methods are used extensively to determine the water vapor transport characteristics of building materials. The dry cup method and the wet cup method prescribe two standardized procedures for this purpose. The dry cup method gives the results as an average value of the property at a mean relative humidity of 25% and the wet cup at 75%. This information is inadequate for detailed hygrothermal analysis of building components. The complete dependence of water vapor permeability on relative humidity is required by most of the current computer models used for hygrothermal analysis. This paper presents an extension of the cup methods in which a series of dry cup and another series of wet cup measurements are suggested at varying relative-humidity levels outside the cup. Also, a detailed procedure for the data analyses to define the dependence of vapor permeability on relative humidity is presented. The methodology is applied successfully to three materials: perlite insulation board, calcium silicate insulation board, and plywood sheathing.
Author | : National Institute of Standards and Technology (U.S.) |
Publisher | : |
Total Pages | : 400 |
Release | : 1992 |
Genre | : |
ISBN | : |
Download Publications of the National Institute of Standards and Technology ... Catalog Book in PDF, ePub and Kindle
Author | : David van Reenen |
Publisher | : |
Total Pages | : 12 |
Release | : 2007 |
Genre | : Building materials |
ISBN | : |
Download Water Vapor Transmission Measurement and Significance of Corrections Book in PDF, ePub and Kindle
Water vapor transmission properties of building materials play an important role in the overall moisture management and durability of the exterior building envelopes. The cup method, as described in the ASTM Standard Test Methods for Water Vapor Transmission of Materials (E 96), is widely used in North America and other parts of the world for this purpose. Recently the latest ASTM standard (E 96/E 96M-05) has started taking into account various corrections (e.g., buoyancy correction, correction for resistance due to still air and specimen surface, edge mask correction, etc.) while analyzing the results obtained from the cup methods. This paper presents the results obtained from the laboratory tests carried out on more than 50 building materials. These results have been used to demonstrate the significance of various corrections on the measured water vapor permeability or permeance of various commonly used building materials or components. The results presented in this paper were discussed in the ASTM technical task group to underline the importance of various corrections for the calculation of water vapor transmission properties of various building materials.
Author | : British Standards Institute Staff |
Publisher | : |
Total Pages | : 40 |
Release | : 1916-08-31 |
Genre | : |
ISBN | : 9780580851919 |
Download Hygrothermal Performance of Building Materials and Products. Determination of Water Vapour Transmission Properties. Cup Method Book in PDF, ePub and Kindle
Construction materials, Humidity, Thermal properties of materials, Water vapour, Water-vapour tests, Water-absorption tests, Permeability measurement
Author | : |
Publisher | : |
Total Pages | : 28 |
Release | : 2016 |
Genre | : Building materials |
ISBN | : |
Download Hygrothermal Performance of Building Materials and Products - Determination of Water Vapour Transmission Properties - Cup Method Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2016 |
Genre | : |
ISBN | : 9788327567741 |
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